Figure 1From: Bone morphogenetic proteins, genetics and the pathophysiology of primary pulmonary hypertension(A) Immunocytochemical localization of BMPR-II in the wall of a muscular pulmonary artery from control human lung. Localization (dark blue product, BCIP/NBT) is seen in the smooth muscle cells (*) and occasional endothelial cells (arrowhead). (B) Control showing the same region of artery, but without addition of antibody. Lu, lumen of artery.Back to article page